NOAO >   Observing Info >   Approved Programs >   2000B-0010

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Program Information for 2000B-0010


PI: Philip Massey, NOAO, massey@lowell.edu
Address: Kitt Peak National Observatory, PO Box 26732, Tucson, AZ 85726-6732 USA

CoI: Paul W Hodge, U. of Washington
CoI: George H Jacoby, NOAO
CoI: Nichole L King, STScI
CoI: Knut Olsen, NOAO
CoI: Abhijit Saha, NOAO
CoI: R Chris Smith, NOAO

Title: The Resolved Stellar Content of Local Group Galaxies Currently Forming Stars

Abstract: The galaxies of the Local Group serve as our laboratories for understanding star formation and stellar evolution in differing environments: the galaxies currently active in star-formation in the Local Group cover a factor of 10 in metallicity and span a range of Hubble types from dwarf spheroidal to Irr to Sb and Sc. We are proposing a uniform survey ({\it UBVRI}, H$\alpha$, [SII], and [OIII]) of nearby galaxies selected on the basis of current star formation. In the Local Group, this sample includes M31, M33, NGC~6822, IC~1613, IC~10, WLM, Pegasus, and Phoenix; we exclude the Milky Way and Magellanic Clouds, which are being surveyed separately by several groups. We also include Sextans~A and Sextans~B, located just beyond the Local Group (van den Bergh 1999a, 1999b). Using the new, wide-field Mosaic cameras, we will produce catalogs of {\it UBVRI} photometry of {\it roughly 100 million stars}, using H$\alpha$, [SII], and [OIII] to distinguish bona fide stellar members from compact H~II regions. This on-line catalog will answer a number of scientific questions directly, but we believe that the real strength of this survey will be in the science we will {\it enable} with 8-10-m class telescopes and the capability of follow-up spectroscopy. In addition, the calibrated images will provide a detailed, uniform atlas of {\it both} the stellar and ionized gas components of these galaxies, which will certainly prove useful for a host of other projects.

Program Type: Survey

Scheduled Nights:
Run 1 (2000B):  KP-4m/MOSA -- 3n on Sep 30 - Oct 05 2000
Run 1 (2001A):  KP-4m/MOSA -- 1n on Feb 26 - Feb 27 2001
Run 1 (2001B):  KP-4m/MOSA -- 3n on Sep 14 - Sep 19 2001
Run 1 (2002A):  KP-4m/MOSA -- 1n on Feb 12 2002, May 13 2002
Run 1 (2002B):  KP-4m/MOSA -- 5n on Sep 07 - Sep 11 2002
Run 2 (2000B):  CT-4m/MOSAIC -- 1n on Aug 31 - Sep 01 2000


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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